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Ignition discharge module: Diagnostics: Misfiring

Emission-related misfiring will generate diagnostic trouble code P0300-P0304.
If catalyst damaging misfiring occurs, diagnostic trouble code P1300-P1304 will be generated. CHECK ENGINE will flash during the misfiring.
If catalyst damaging misfiring occurs in conjunction with a fuel level below 4 liters, diagnostic trouble code P1390-P1394 will be generated. CHECK ENGINE will flash during the misfiring.